Clock calibration method and system

The invention discloses a clock calibration method, which comprises the following steps of: receiving a start-of-frame (SOF) signal of a universal serial bus (USB) host of any personal computer (PC) as a reference clock signal; starting to count synchronously with the received SOF signal, and settin...

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Bibliographic Details
Main Authors CAI BINGQUAN, LIU JIE, HU XIANGJUN
Format Patent
LanguageChinese
English
Published 12.06.2013
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention discloses a clock calibration method, which comprises the following steps of: receiving a start-of-frame (SOF) signal of a universal serial bus (USB) host of any personal computer (PC) as a reference clock signal; starting to count synchronously with the received SOF signal, and setting a numerical value of a counting time interval to be the same as that of a time interval of the SOF signal; performing comparison and calculation to obtain a difference value between the actual counting time interval and the time interval of the SOF value; and calibrating a clock according to the difference value. The invention also discloses a clock calibration method-based clock calibration system. An accurate clock of the PC is taken as a reference clock, and any PC is connected to achieve a clock calibration effect; and a user can introduce the SOF signal of the USB host of the PC through a signal detection unit to automatically fulfill the aim of clock calibration, so that a convenient and quick calibration w
Bibliography:Application Number: CN2013191093